The Steelers have claimed Marquis Cooper off of waivers from the Seahawks.  He played in 4 games last season in Seattle and he only made 1 tackle.  Cooper has now played three seasons in the NFL and he has played in 30 games and made 28 tackles.  He is very undersized (6’3″, 213 pounds) to play much defense for the Steelers but he could help them out on special teams.